In a sedimentary rock that contains inclusions of metamorphic rock, the inclusions must be
A) older than the sedimentary rock.
B) younger than the sedimentary rock.
C) on top of the sedimentary rock.
D) below the sedimentary rock.
Answer: A
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The main constituent of the Martian atmosphere is
A) methane. B) helium. C) carbon dioxide. D) hydrogen. E) nitrogen.
Directly opposite the Tharsis uplift and volcanoes on Mars lies the deep ________, perhaps suggesting impact cause and volcanic effect
Fill in the blank(s) with correct word
How much of the solar system's total mass is contained in the Sun?
A) about half B) about 90% C) about 95% D) about 99.8% E) exactly 100%
Three infinite planes of charge, A, B and C, are vertical and parallel to one another. There is a uniform electric field 
to the left of plane A and a uniform electric field 
to the right of plane C. The field
src="https://sciemce.com/media/2/ppg__cognero__Chapter_25_Gauss_apos_s_Law.__media__d157b51e-e802-42c3-b389-ecf53d0f5676.PNG" style="font-family:'times new roman';vertical-align:middle;" /> points to the left and the field points to the right. The signs of the charges on plates A, B and C may be
A. ?, ?, ?.
B. +, ?, ?.
C. +, ?, +.
D. +, +, +.
E. any one of the above.